1 /*=====================================================================================================
2 chdk_dasm.h
3
4 This sofware is provided "as is" with no warantee or representation of any "fitness for use"/
5
6 This software contains code included under the license included below. The code was changed to
7 - provide formatting compatible with gcc as used for CHDK development
8 - provide a multi-pass approach was added to allow the generation and handling of labels.
9 - expanded command line options
10 - correction to dissassembly bugs and added support for the STRD instruction.
11
12 None of these modifications are the work of the original author.
13
14 And if you are wondering, the original dissassembler code appears to have been optimized to
15 run on an ARM process, which explains all the goofy use of left and right shifts. Those compile
16 nicely to a single instrucion on the ARM processor.
17
18 =====================================================================================================*/
19
20 /* disarm -- a simple disassembler for ARM instructions
21 * (c) 2000 Gareth McCaughan
22 *
23 * This file may be distributed and used freely provided:
24 * 1. You do not distribute any version that lacks this
25 * copyright notice (exactly as it appears here, extending
26 * from the start to the end of the C-language comment
27 * containing these words)); and,
28 * 2. If you distribute any modified version, its source
29 * contains a clear description of the ways in which
30 * it differs from the original version, and a clear
31 * indication that the changes are not mine.
32 * There is no restriction on your permission to use and
33 * distribute object code or executable code derived from
34 * this.
35 *
36 * The original version of this file (or perhaps a later
37 * version by the original author) may or may not be
38 * available at http://web.ukonline.co.uk/g.mccaughan/g/software.html .
39 *
40 * Share and enjoy! -- g
41 */
42
43 typedef unsigned int t_address;
44 typedef unsigned int t_value;
45
46 #define declstruct(name) typedef struct name s##name, * p##name
47 #define defstruct(name) struct name
48 #define defequiv(new,old) typedef struct old s##new, * p##new
49
50 declstruct(DisOptions);
51
52 #define disopt_SWInames 0x001 /* use names, not &nnnn */
53 #define disopt_CommaSpace 0x002 /* put spaces after commas */
54 #define disopt_FIXS 0x004 /* bogus FIX syntax for ObjAsm */
55 #define disopt_print_address_mode 0x008 /* output in plain mode - no address comments */
56 #define disopt_indent_mneumonics_mode 0x010 /* indent mneumonics additionally */
57 #define disopt_patch_comment 0x020 // add comment to patched instruction
58 #define disopt_exclude_dcd 0x040 // Don't write 'DCD' disassembly
59 #define disopt_nullsub_call 0x080 // Call to nullsub detected
60 #define disopt_patch_branch 0x100 // patch address in next instruction
61 #define disopt_patch_value 0x200 // patch value in next instruction
62 #define disopt_remember_branches 0x400 // enable/disable storing branch addresses
63 #define disopt_comment_lines 0x800 // enable/disable commenting out of instructions
64 #define disopt_line_numbers 0x1000 // print line number of firmware code
65
66 defstruct(DisOptions) {
67 t_value flags;
68 char * * regnames; /* pointer to 16 |char *|s: register names */
69 t_address ROM_start;
70 t_address ROM_end;
71 t_address start_address;
72 t_address end_address;
73 };
74
75 extern t_address addr, last_used_addr;
76 extern sDisOptions options;
77 extern struct llist *branch_list;
78 extern char *patch_func_name;
79 extern t_address patch_new_val;
80 extern t_address patch_old_val;
81 extern int patch_ref_address[20];
82 extern char patch_ref_name[20][256];
83 extern int save_patch_ref;
84 extern char *patch_comment;
85
86 struct lnode * l_search(struct llist *ls, t_address address);
87 void l_remove(struct llist *ls, t_address addr);
88 t_address find_end(firmware *fw, t_address start);
89 void disassemble1(firmware *fw, t_address start, t_value length);
90 void disassemble(firmware *fw, FILE *outfile, t_address start, t_value length);